The alochton woody plants in Štiavnické Mountains was introduced on the end of 19. and the beginning of 20. century, thanks to the Professors of the Mining and Forestry Academy in Banská Štiavnica City. The goal of introduction was growth and production study for scientific purpose, for forestry teaching processes and for forest management. In 2009 on the territory of School Forest District Kysihýbel near the Banská Štiavnica city was founded series of research plots in the groups of forest types Querceto-Fagetum for monitoring purpose of selected alochton woody plants influenced the humus quality and vegetation cover. The presence of alochton woody plants Pseudotsuga menziesii, Pinus strobus, Picea abies, Larix decidua, Pinus sylvestris in research plots was 100 %. The native trees Quercus petraea and Fagus sylvatica in the comparative plots has been dominant presentation. There were evaluated soil reaction (pH/H2O, pH/KCl), humus quality, ecological groups of plants and ecological demands of plants on basic environmental factors – light, temperature, continentality, moisture and nitrogen in soil (by ELLENBERG, 1992).